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 TM 5-4120-393-14
5-5. Evaporator Fan Motors (B3A and B3B) (Welco Industries Model) (cont)
f.
Secure cable clamp (2).
3.
To replace thermostat:
a.
Using screwdriver, remove four screws (3) from cover (4).
b.
Remove cover (4).
c.
Using scre wdriver, remove two screws (5) and spacers (7).
d.
Pull thermostat (6) away from motor.
e.
Tag and disconnect leads to the thermostat (6).
f.
Remove old thermostat (6).
g.
See tags and connect leads to new thermostat (6).
h.
Remove tags.
i.
Using screwdriver, secure thermostat (6) with two screws (5) and spacer (7).
j.
Using screwdriver, secure cover (4) with four screws (3).
4.
To replace bearings:
a.
Match-mark motor frame (8) and both end brackets (9) and (10) to ease reassembly.
b.
Using screwdriver, remove four screws (11) from each end bracket (9) and (10).
c.
Carefully separate end brackets (9) and (10) from motor frame. Use a brass or plastic bar and hammer and tap
end brackets away from motor frame. Tap opposite sides, top, and bottom in alternating sequence to break end
brackets loose.
5-8
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